Information Technology Reference
In-Depth Information
col.plane.3d
Three-dimensional biplots: colour of optional plane added to a
three-dimensional biplot. Defaults to
"lightgrey"
.
col.text.3d
Three-dimensional biplots: specifies colour of labels of
three-dimensional biplot axes. Defaults to
"black"
.
columns
Formatting legend: integer value specifying number of column
blocks in a legend. Defaults to a single column block.
constant
Numeric value for regulating the vertical translation of
horizontal biplot axes in a one-dimensional biplot. A
negative value results in biplot axes to be shifted
downwards and a positive value in an upwards
displacement. Defaults to 0.1.
correlation.biplot
PCA biplot that optimizes the approximation of the
correlations among the variables. Defaults to FALSE. Note
that this is not the same as the 'true' correlation biplot
discussed in Chapter 10 as an example of a monoplot.
One-dimensional biplot: logical value specifying if density
estimates are added to a one-dimensional biplot. Defaults to
FALSE.
density.plot
The value of
α
resulting in a
κ
-ellipse covering approximately
100
α
% of the configuration of two-dimensional points. See
Section 2.9.2.
ellipse.alpha
The value of
κ
to construct a
κ
-ellipse. See Section 2.9.2.
ellipse.kappa
Default is 1.20. Positive numeric value regulating scaffolding
axes of the biplot. Larger values for zooming out and
smaller values for zooming in with respect to sample points
in the biplot display.
exp.factor
Three-dimensional biplot: numeric value regulating diameter
in the x direction of a plane added to a three-dimensional
biplot. Default is 2.
factor.x
Three-dimensional biplot: numeric value regulating diameter
in the y direction of a plane added to a three-dimensional
biplot. Default is 2.
factor.y
Three-dimensional biplot: specifies font to be used for text in
a three-dimensional biplot. Default is 2.
font.3d
Three-dimensional biplot: logical value specifying if samples
in a three-dimensional biplot are labelled in the
three-dimensional biplot. Defaults to FALSE.
ID.labs
A vector specifying the labels of samples in a
three-dimensional biplot. Defaults to 1, 2, 3 and so on.
ID.3d
A vector specifying if samples in a one- or two-dimensional
biplot are to be labelled. Defaults to TRUE.
label
Scalar value regulating size of labels of samples in a one- or
two-dimensional biplot. Defaults to 0.75.
label.size
Logical value specifying if a large-scale version of the biplot
is required. Mainly used in the case of several groups to
focus on the area occupied by the group means. Defaults to
FALSE.
large.scale
